<template>
  <div id="root">
    <div class="todo-container">
      <div class="todo-wrap">
        <!-- 头部区域 -->
        <Header :addTodo="addTodo"/>
        <!-- 列表区域 -->
        <List :todos="todos" :deleteTodo="deleteTodo" :checkTodo="checkTodo"/>
        <!-- 底部区域 -->
        <Footer :todos="todos" :clearAllDone="clearAllDone"/>
      </div>
    </div>
  </div>
</template>

<script>
  import Header from './components/Header.vue'
  import List from './components/List.vue'
  import Footer from './components/Footer.vue'
  export default {
    name: 'App',
    components: { Header, List, Footer },
    data() {
      return {
        todos:[
          {id:'asfdtrysau01',name:'吃饭',done:false},
          {id:'asfdtrysau02',name:'学习',done:true},
          {id:'asfdtrysau03',name:'逛街',done:false},
          {id:'asfdtrysau04',name:'打游戏',done:true},
          {id:'asfdtrysau05',name:'打台球',done:false},
        ]
      }
    },
    methods: {
      // 用于：①接收Header传递过来的todo对象，②向todos中添加这个todo对象
      addTodo(value){
        // console.log('App-addTodo',value)
        this.todos.unshift(value)
      },
      // 用于：①接收Item传递过来id，②操作todos删除id对应的那一项
      deleteTodo(id){
        // 借助数组的filter实现删除
        this.todos = this.todos.filter((item)=>{
          return item.id !== id
        })
      },
      // 用于：①接收Item传递过来id，②操作todos勾选/取消勾选对应的那一项
      checkTodo(id){
        this.todos.forEach((item)=>{
          if(item.id === id){
            item.done = !item.done
          }
        })
      },
      // 用于：操作todos数组，干掉所有done值为真的
      clearAllDone(){
        if(confirm('确定吗？')){
          this.todos = this.todos.filter(item => !item.done)
        }
      }
    },
  }
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}

.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>